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first find the critical points and use integration

or just consider one side of it

*units ^3

please dont ask for "just an answer"

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this can be done by shells or disks; which way are you most comfortable with?

i think i know why youre twice as big as the answer; your prolly integrating the whole thing across

your in effect sweeping the same volume twice when you do that

the answer is 8pi

no offense taken :)

@amistre64 i thought it was around y axis, shouldn't be dy not dx ?

oh i see, so for the shell method where does the x come from in x(4-x^2)

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OH I GET IT NOW ! thanks @amistre64

youre welcome